Entity framework core Pomelo实体框架核心支架在MySQL数据库中失败；无法添加批注，因为已存在同名批注。”；

当我尝试使用以下方法构建现有MySQL DB时：

Scaffold DbContext“server=server；user=user；password=pw；database=db”“Pomelo.EntityFrameworkCore.MySql”-OutputDir EF-f

我得到以下错误：

System.InvalidOperationException: The annotation 'MySql:IndexPrefixLength' cannot be added because an annotation with the same name already exists**.
   at Microsoft.EntityFrameworkCore.Infrastructure.Annotatable.AddAnnotation(String name, Annotation annotation)
   at Microsoft.EntityFrameworkCore.Infrastructure.Annotatable.AddAnnotation(String name, Object value)
   at Microsoft.EntityFrameworkCore.Infrastructure.Annotatable.Microsoft.EntityFrameworkCore.Metadata.IMutableAnnotatable.AddAnnotation(String name, Object value)
   at Microsoft.EntityFrameworkCore.MutableAnnotatableExtensions.AddAnnotations(IMutableAnnotatable annotatable, IEnumerable`1 annotations)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitIndex(EntityTypeBuilder builder, DatabaseIndex index)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitIndexes(EntityTypeBuilder builder, ICollection`1 indexes)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitTable(ModelBuilder modelBuilder, DatabaseTable table)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitTables(ModelBuilder modelBuilder, ICollection`1 tables)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitDatabaseModel(ModelBuilder modelBuilder, DatabaseModel databaseModel)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.Create(DatabaseModel databaseModel, Boolean useDatabaseNames)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.ReverseEngineerScaffolder.ScaffoldModel(String connectionString, DatabaseModelFactoryOptions databaseOptions, ModelReverseEngineerOptions modelOptions, ModelCodeGenerationOptions codeOptions)
   at Microsoft.EntityFrameworkCore.Design.Internal.DatabaseOperations.ScaffoldContext(String provider, String connectionString, String outputDir, String outputContextDir, String dbContextClassName, IEnumerable`1 schemas, IEnumerable`1 tables, Boolean useDataAnnotations, Boolean overwriteFiles, Boolean useDatabaseNames)
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.ScaffoldContextImpl(String provider, String connectionString, String outputDir, String outputDbContextDir, String dbContextClassName, IEnumerable`1 schemaFilters, IEnumerable`1 tableFilters, Boolean useDataAnnotations, Boolean overwriteFiles, Boolean useDatabaseNames)
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.ScaffoldContext.<>c__DisplayClass0_0.<.ctor>b__0()
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.<>c__DisplayClass3_0`1.<Execute>b__0()
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)
The annotation 'MySql:IndexPrefixLength' cannot be added because an annotation with the same name already exists.*

System.invalidoOperationException:无法添加批注“MySql:IndexPrefixLength”，因为已存在同名批注**。
位于Microsoft.EntityFrameworkCore.Infrastructure.Annotatable.AddAnnotation（字符串名称，注释）
位于Microsoft.EntityFrameworkCore.Infrastructure.Annotatable.AddAnnotation（字符串名称，对象值）
位于Microsoft.EntityFrameworkCore.Infrastructure.Annotatable.Microsoft.EntityFrameworkCore.Metadata.IMutableAnnotatable.AddAnnotation（字符串名称，对象值）
位于Microsoft.EntityFrameworkCore.MutableAnnotataTableExtensions.AddAnnotations（IMutableAnnotatable annotatable，IEnumerable`1 annotations）
位于Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitIndex（EntityTypeBuilder构建器，数据库索引）
位于Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitIndexes（EntityTypeBuilder builder，ICollection`1索引）
位于Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitTable（ModelBuilder ModelBuilder，DatabaseTable表）
位于Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitTables（ModelBuilder ModelBuilder，ICollection`1表）
位于Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitDatabaseModel（ModelBuilder ModelBuilder，DatabaseModel DatabaseModel DatabaseModel）
位于Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.Create（DatabaseModel DatabaseModel，布尔值useDatabaseNames）
位于Microsoft.EntityFrameworkCore.Scaffolding.Internal.ReverseeEngineerCafFolder.ScaffoldModel（字符串连接字符串、数据库模型工厂选项数据库选项、模型ReverseeEngineerOptions模型选项、模型代码生成选项代码选项）
位于Microsoft.EntityFrameworkCore.Design.Internal.DatabaseOperations.ScaffoldContext（字符串提供程序、字符串连接字符串、字符串outputDir、字符串outputContextDir、字符串dbContextClassName、IEnumerable`1模式、IEnumerable`1表、布尔useDataAnnotations、布尔重写文件、布尔useDatabaseNames）
位于Microsoft.EntityFrameworkCore.Design.OperationExecutor.ScaffoldContextImpl（字符串提供程序、字符串连接字符串、字符串输出目录、字符串输出目录ContextDir、字符串dbContextClassName、IEnumerable`1架构过滤器、IEnumerable`1表格过滤器、布尔useDataAnnotations、布尔重写文件、布尔useDatabaseNames）
在Microsoft.EntityFrameworkCore.Design.OperationExecutor.ScaffoldContext.c__DisplayClass0_0.b_0（）中
在Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.c__DisplayClass3_0`1.b__0（）中
位于Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute（操作）
无法添加批注“MySql:IndexPrefixLength”，因为已存在同名批注*

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我使用Microsoft软件包成功地为同一项目中的同一数据库搭建了脚手架，没有任何问题。

Pomelo团队已确认该问题是一个bug。 如果一列上有多个索引，并且两个索引都使用索引前缀，则会发生此异常。修复程序将很快发布：

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哪个提供程序版本？

所有运行时；建设；本地人；内容文件；分析仪；构建可传递的